When you shine a light on HAL's eyes, his pupils may or may not dilate.

当你用照射 HAL 眼睛时，他瞳孔会根据病情选择性地放大或不放大。

It is a fact that when a person sees something appealing to them, their pupils dilate.

事实上，当一个人看到吸引他东西时，他瞳孔会放大。

Harry could have sworn his over-large nostrils were dilating, trying to sniff Harry out.

哈利敢肯定，他本来就大鼻孔张得更大了，像要嗅出哈利所在位置。

Ms Sumner, your pupils are dilating.

萨姆纳小姐，你瞳孔在扩大。

With no need for eye drops that dilate your pupils for hours.

如此一来，你不需要检查眼睛前滴上散瞳药水了。

Your pupils dilate when you're scared, nervous or excited.

当你害怕、紧张或兴奋时，你瞳孔会放大。

Her face went whiter and her brown eyes dilated enormously.

她脸色更苍白，那双褐色眼睛也瞪大到了吓人程度。

This is where the arteriole walls develop hyaline deposits, which makes it harder for them to dilate.

这是小动脉壁形成透明沉积物地方，使得它们很难扩张。

When animals get hot, tiny capillaries near the surface of the skin dilate.

动物热时候，体表毛细血管扩张。

During totality it's dark, so your pupils have dilated to let more light in.

日全食时天空完全黑暗，你瞳孔会扩张来让更多通过。

Your ability to sweat, dilating your blood vessels, all those things help promote heat loss.

你出汗能力，扩张血管能力，所有这些能力都有助于散热降温。

It was said to make their pupils dilate so that they would look more beautiful.

据说这能让瞳孔变大，让她们看起来更漂亮。

These can let through too much infrared and ultraviolet light, and again can dilate your pupils, actually making things worse.

过多红外和紫外都能穿过他们，同样会使瞳孔扩散。实际上让情况更糟糕。

Lastly, your pupils sometimes dilate if you're in love or if you're aroused.

最后，当你恋爱或被唤醒时，你瞳孔有时会放大。

In the dim light of the radiology room, her pupils were dilated into deep black pools.

在放射科昏暗灯下，她瞳孔放大成一片深黑色。

At regular concentrations of about 1 percent, atropine is used to dilate the pupil for eye exams.

浓度为1%阿托品通常被用于在眼科检查中放大瞳孔。

This, in turn, helps cause brain arteries to dilate, which activates the trigeminal nerve, causing us pain.

这反过来又会导致脑动脉扩张，从而激活三叉神经，引起疼痛。

The reason behind this is unclear, but nitric oxide makes peripheral arteries dilate, so blood pressure drops.

其中原因尚不明确，但是，一氧化氮会导致外周动脉扩张，血压因而下降。

Normally, these sympathetic nerves help to dilate the pupil, raise the eyelid, and help stimulate the sweat glands.

正常情况下，这些交感神经能扩瞳、提上眼睑，以及协助刺激汗腺。

In ophthalmology, a synthesized form of the same chemical can still be used to help dilate the pupils.

在眼科，这种化学物质合成物仍可以用来帮助扩大瞳孔。